diff options
Diffstat (limited to 'include/linux/mtd/mtd.h')
| -rw-r--r-- | include/linux/mtd/mtd.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 7122efdc6d99..e488cf910914 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -352,6 +352,8 @@ static inline int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, u_char *buf) { *retlen = 0; + if (!mtd->read_fact_prot_reg) + return -EOPNOTSUPP; return mtd->read_fact_prot_reg(mtd, from, len, retlen, buf); } @@ -369,6 +371,8 @@ static inline int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, u_char *buf) { *retlen = 0; + if (!mtd->read_user_prot_reg) + return -EOPNOTSUPP; return mtd->read_user_prot_reg(mtd, from, len, retlen, buf); } |